Biomasse Ennsdorf Ernsthofen RZ NQ E

8/12/2019 Biomasse Ennsdorf Ernsthofen RZ NQ E

1/8

Project information

Construction of two identical biomass heating power plants

in Ernsthofen and Ennsdorf (Austria)


2/8

2

General contractor for the complete engineering, supply, installation,commissioning and trial operation of two identical biomass heating power plants.

Project description.

Flue gas cleaning system

with electrical filter and

upstream multicyclone.


3/8

3Kraftanlagen Mnchen GmbH | Construction of two identical biomass heating power plants in Ernsthofen and Ennsdorf (Austria)

Customer

Ernsthofen: BioMa Energie AG, Salzburg

Ennsdorf: SBH Biomasse-Heizkraftwerk GmbH, Purkersdorf

Plant description

The main process chain basically consists of the wood fuel recei-

ver and storage, the fuel conveyor system, firing, steam genera-

tor, dust removal, district heating extraction and the energy sys-

tem. The auxiliary systems, comprised of the water treatment,

auxiliary cooling water system, electrical and instrumentation& control systems, heating, air conditioning, ventilation, sanitary

facilities and fire protection, ensure safe operation of the plant.

Our services

Complete engineering of construction, process, electrical

and I&C systems

Fuel charging systems, fuel oil supply

Biomass furnace with steam generator

Flue gas cleaning

Steam turbine with generator and air condensation plant

Water/steam cycle with water treatment Piping and components

District heating extraction with standby boiler

Electrical and I&C systems

Fire-fighting facilities

Complete construction engineering for the power plant and

the moving-floor building

Complete building installations (HVAC, sanitary facilities, fire

protection, lighting and power outlets)

Commissioning and trial operation of the entire plant

Project milestones

Placement of orders December 2004 and January 2005

Construction period March 2005 to April 2006

Commissioning / Trial operation March to July 2006

Picture on the left:Air-cooled condensation

plant.

Picture below:

Systems engineering in

the turbine house.


4/8

4

Plant description.Functionality of the biomass power plantsErnsthofen and Ennsdorf.

Water/steam cycle

The steam from the biomass boiler is con-

verted into electricity in the turbine and

then extracted for the generation of dis-

trict heat at approx. 2 bar. The remaining

steam is then condensed in the air con-densation plant and fed back into the bio-

mass boiler via pumps following degasifi-

cation in the feedwater tank. In the event

of a turbine failure, the steam supply to

the district heating condenser and the

feedwater tank can be maintained by

means of a reducing station.

Biomass furnace and boiler

The firing system comprises a grate fur-

nace with rod charging and a downstream

air-cooled multizone advancing grate fol-lowed by a burnout grate. The steam ge-

nerator takes the form of a water tube

boiler with an operating pressure of 65

bar absolute and an operating tempera-

ture of 480 C. In the 4-pass boiler, the

flue gases enter the 1st radiant section

after they leave the combustion chamber

and then enter the 2nd boiler pass, which

is also a radiant section in this case. The

superheater and evaporator bundles are

configured in the 3rd boiler pass. The eco-nomizer, which heats up the feedwater, is

located in the 4th boiler pass, downstream

the combustion air is heated in the air

heater.

Pressure maintenance

Feedwater tank

Feedwater pumps

Electrical, instru-mentation & control

systems

Condensate

Watertreatment

Biomass boiConveyor systemWood fuel storage

Secondaryair blower

Control room

District heating10 MW

ASW pumps

Closed circuit cooler

DH pumps Main conden

Standby boilerStack(Standby boiler)

Heating condenser


5/8


Technical data

Thermal furnace output biomass boiler 23.7 MW

High-pressure steam quantity 25.5 t/h

High-pressure steam parameters 480 C, 65 bar

Thermal furnace output standby boiler 10.8 MW

Gross electrical output of steam turbine 5 MW

District heating output 10 MW max.

Forward / Return temperatures 106 / 65 C

Annual biomass fuel capacity up to 80,000 t

Calorific value 7.6 - 13.2 MJ/kg

District heating

The steam extracted from the turbine is

transferred to the district heating system

into a steam/hot water heat exchanger.

Two redundant district heating network

pumps circulate the hot water to the con-

sumers via underground plastic-jacket

pipes. Up to 10 MW of district heating

power can be generated during full-load

operation. One warm water boiler witha thermal output of 10 MW is equipped

with a fuel oil burner and tank for stand-

by purposes.

Flue gas cleaning system

The removal of dust from the flue gases

created during the combustion of untrea-

ted wood fuel takes place in two stages.

The initial dust separation in a multicy-

clone, the second stage in a one-field

electrical filter.

nk

65 bar

480 C

HP reducing station

Bypass station

Electrical power5 MW

20 kV

6,3 kV

Steam turbineTurbine con-densate tank

Air-cooledcondensation plant

er Multicyclone Induced draftblower and stack

Electrical filterPrimary air blower

te tank

Recircula-tion blower

Ash container

ECO Air pre-heater

Transformer


6/8

6

Electrical, instrumentation and control technology.Operating and safety concept.

System control

The two biomass heating power plants

are equipped with the PCS7 process con-

trol system from Siemens. The instrumen-tation & control system is redundantly

configured at the operating level, thus en-

suring an availability of over 8,000 hours.

The plant is operated and monitored from

the control room via a fully graphical in-

terface. Faults are automatically reported

to the operator personnel via radio tele-

phone.

The biomass heating power plant is equip-

ped for 24-hour unsupervised operation.Plant protection is permanently and relia-

bly monitored by a safety PLC. A fire alarm

system which forwards alarms to the fire

department ensures the fire protection

for the entire plant.

Even in the event of a power failure the

instrumentation and control systems of

the entire plant, the pressurized air supply

and the auxiliary cooling water supply are

safely supplied with electrical energy bymeans of a battery-backed uninterrup-

tible power supply (UPS). This ensures

controlled shutdown of the plant.

Picture above:

PCS7 interface.

Picture in the middle:

Generator.

Picture on the left:

Safety PLC.


7/8


Environmental protection.Compliance of the applicable emission limits.

Fuel

Only natural untreated fuels, such as waste wood and choppings

from forests, and uncontaminated waste wood from sawmillsare used. Untreated waste woods from landscape gardening are

another source of fuel. The use of sustainable fuels conserves

the environment, as only the same amount of CO2is released

during the incineration of biomass as was removed from the at-

mosphere when the raw material was growing. Compared with

the use of EL fuel oil, this amounts to a reduction of approx.

16 million liters and approx. 25,000 tons per year of the green-

house gas, carbon dioxide. A decentralized power supply, coupled

with the combined generation of heat and power, ensures a high

degree of fuel efficiency. The use of re-

gional renewable fuels also reduces theenvironmental impact and at the same

time creates jobs in the region.

Picture above: Flue gas cleaning system and stack.

Pictures below: Waste wood and choppings from forest.

Flue gas cleaning

As well as using an environmentally friendly CO2-neutral fuel

and efficient firing technology, an electrical filter system with an

upstream multicyclone ensures compliance with the emissionslimits stipulated by the Austrian clean air ordinance for boiler

systems. The cleaned flue gases are transported to the 40 m high

stack by an induced-draft fan. A flue gas silencer ensures ad-

herence to the permitted sound power level of 85 dB(A) at the

stack outlet. The waste substances from the cyclone and the

electrical filter are collected in separate containers and disposed

of in accordance with specifications.


8/8

Biomass heating power

plant Ernsthofen (Austria).

Divisions of the Kraftanlagen Mnchen Group

Power plant technology

Energy technology

Renewable energies

Underground piping construction

Utility services

Chemical and petrochemical plantsFabrication

Engineering services

Kraftanlagen Mnchen GmbH

Ridlerstrasse 31 c | 80339 Munich

Germany

T: +49 89 6237-0 | F: +49 89 6237-223

[email protected]

www.ka-muenchen.de

1111.07.1 20.5.961

Documents

Biomasse Ennsdorf Ernsthofen RZ NQ E